{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:XZYHMKIK3CER2E7G24IGVY42OO","short_pith_number":"pith:XZYHMKIK","canonical_record":{"source":{"id":"2509.00478","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-08-30T12:27:29Z","cross_cats_sorted":[],"title_canon_sha256":"e5ac82cd73e87f8e25885fc33e8c792cc0b52e1679f488fa0be92c601b61f4f8","abstract_canon_sha256":"21dbdf3812acad422692bcdb7be7290a66f37bcdd32d0b111954268b455d1aef"},"schema_version":"1.0"},"canonical_sha256":"be7076290ad8891d13e6d7106ae39a73b12ece244f6ff33fae0296d2990abcbe","source":{"kind":"arxiv","id":"2509.00478","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.00478","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"arxiv_version","alias_value":"2509.00478v3","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.00478","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"pith_short_12","alias_value":"XZYHMKIK3CER","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"pith_short_16","alias_value":"XZYHMKIK3CER2E7G","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"pith_short_8","alias_value":"XZYHMKIK","created_at":"2026-06-04T01:08:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:XZYHMKIK3CER2E7G24IGVY42OO","target":"record","payload":{"canonical_record":{"source":{"id":"2509.00478","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-08-30T12:27:29Z","cross_cats_sorted":[],"title_canon_sha256":"e5ac82cd73e87f8e25885fc33e8c792cc0b52e1679f488fa0be92c601b61f4f8","abstract_canon_sha256":"21dbdf3812acad422692bcdb7be7290a66f37bcdd32d0b111954268b455d1aef"},"schema_version":"1.0"},"canonical_sha256":"be7076290ad8891d13e6d7106ae39a73b12ece244f6ff33fae0296d2990abcbe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-04T01:08:31.399840Z","signature_b64":"pQdf8kF05u+YmS9F4dVUXhQrzq2jisrqHB5/SFBXHBrk5DgB7n8s5JgffgVmRoeG4eq9Vb0mqqf0YWjXgAm+Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"be7076290ad8891d13e6d7106ae39a73b12ece244f6ff33fae0296d2990abcbe","last_reissued_at":"2026-06-04T01:08:31.399111Z","signature_status":"signed_v1","first_computed_at":"2026-06-04T01:08:31.399111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2509.00478","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-04T01:08:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LSkDawk08eVVjlGwzV5xDqb0TkSh0VtWSSHkBIXuLi2sW4aPW7fE4vZpA4D2J2eZ6XB97D7byJx10tZHXgFqAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T18:52:56.040700Z"},"content_sha256":"36c9ba82a631dccf6f5a79b68f1fa8d707cc1d6233a3484b5806f11b548e865c","schema_version":"1.0","event_id":"sha256:36c9ba82a631dccf6f5a79b68f1fa8d707cc1d6233a3484b5806f11b548e865c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:XZYHMKIK3CER2E7G24IGVY42OO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Manifold Optimization-based Pilot Allocation for Cell-Free Massive MIMO ISAC Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Getuar Rexhepi, Giuseppe Thadeu Freitas de Abreu, Kuranage Roche Rayan Ranasinghe","submitted_at":"2025-08-30T12:27:29Z","abstract_excerpt":"We address the challenge of pilot design in cell-free massive multiple input multiple output (CF-mMIMO) integrated sensing and communications (ISAC) systems. We propose a novel pilot allocation framework based on manifold optimization that maximizes the system sum rate by minimizing coherence among pilot sequences, while enforcing unimodularity constraints in the frequency domain to ensure pilots are suitable for both communication and sensing tasks. Simulation results demonstrate that the proposed pilot design achieves communication performance comparable to state-of-the-art (SotA) algorithms"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.00478","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2509.00478/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-04T01:08:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3U6O4hI+yZCh+q2hOrsW/Be3TztuWbx9gNuFNd9PSzSn5uIVyWRS7NC/KEj/O82KgNsxAcJqkO+MSzWe1BhdDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T18:52:56.041355Z"},"content_sha256":"1addacfcee6457aa4fa256b5538d9d8d265dbff7b483c6b87489617f7ccc59f9","schema_version":"1.0","event_id":"sha256:1addacfcee6457aa4fa256b5538d9d8d265dbff7b483c6b87489617f7ccc59f9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XZYHMKIK3CER2E7G24IGVY42OO/bundle.json","state_url":"https://pith.science/pith/XZYHMKIK3CER2E7G24IGVY42OO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XZYHMKIK3CER2E7G24IGVY42OO/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-07T18:52:56Z","links":{"resolver":"https://pith.science/pith/XZYHMKIK3CER2E7G24IGVY42OO","bundle":"https://pith.science/pith/XZYHMKIK3CER2E7G24IGVY42OO/bundle.json","state":"https://pith.science/pith/XZYHMKIK3CER2E7G24IGVY42OO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XZYHMKIK3CER2E7G24IGVY42OO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:XZYHMKIK3CER2E7G24IGVY42OO","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"21dbdf3812acad422692bcdb7be7290a66f37bcdd32d0b111954268b455d1aef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-08-30T12:27:29Z","title_canon_sha256":"e5ac82cd73e87f8e25885fc33e8c792cc0b52e1679f488fa0be92c601b61f4f8"},"schema_version":"1.0","source":{"id":"2509.00478","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.00478","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"arxiv_version","alias_value":"2509.00478v3","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.00478","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"pith_short_12","alias_value":"XZYHMKIK3CER","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"pith_short_16","alias_value":"XZYHMKIK3CER2E7G","created_at":"2026-06-04T01:08:31Z"},{"alias_kind":"pith_short_8","alias_value":"XZYHMKIK","created_at":"2026-06-04T01:08:31Z"}],"graph_snapshots":[{"event_id":"sha256:1addacfcee6457aa4fa256b5538d9d8d265dbff7b483c6b87489617f7ccc59f9","target":"graph","created_at":"2026-06-04T01:08:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2509.00478/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We address the challenge of pilot design in cell-free massive multiple input multiple output (CF-mMIMO) integrated sensing and communications (ISAC) systems. We propose a novel pilot allocation framework based on manifold optimization that maximizes the system sum rate by minimizing coherence among pilot sequences, while enforcing unimodularity constraints in the frequency domain to ensure pilots are suitable for both communication and sensing tasks. Simulation results demonstrate that the proposed pilot design achieves communication performance comparable to state-of-the-art (SotA) algorithms","authors_text":"Getuar Rexhepi, Giuseppe Thadeu Freitas de Abreu, Kuranage Roche Rayan Ranasinghe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-08-30T12:27:29Z","title":"Manifold Optimization-based Pilot Allocation for Cell-Free Massive MIMO ISAC Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.00478","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:36c9ba82a631dccf6f5a79b68f1fa8d707cc1d6233a3484b5806f11b548e865c","target":"record","created_at":"2026-06-04T01:08:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"21dbdf3812acad422692bcdb7be7290a66f37bcdd32d0b111954268b455d1aef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2025-08-30T12:27:29Z","title_canon_sha256":"e5ac82cd73e87f8e25885fc33e8c792cc0b52e1679f488fa0be92c601b61f4f8"},"schema_version":"1.0","source":{"id":"2509.00478","kind":"arxiv","version":3}},"canonical_sha256":"be7076290ad8891d13e6d7106ae39a73b12ece244f6ff33fae0296d2990abcbe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be7076290ad8891d13e6d7106ae39a73b12ece244f6ff33fae0296d2990abcbe","first_computed_at":"2026-06-04T01:08:31.399111Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-04T01:08:31.399111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pQdf8kF05u+YmS9F4dVUXhQrzq2jisrqHB5/SFBXHBrk5DgB7n8s5JgffgVmRoeG4eq9Vb0mqqf0YWjXgAm+Cw==","signature_status":"signed_v1","signed_at":"2026-06-04T01:08:31.399840Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.00478","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36c9ba82a631dccf6f5a79b68f1fa8d707cc1d6233a3484b5806f11b548e865c","sha256:1addacfcee6457aa4fa256b5538d9d8d265dbff7b483c6b87489617f7ccc59f9"],"state_sha256":"e4d1bfee7e48a136bba48e1408b93c644d957cb3405ac64ceedeaee128a1e2a3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zvYucfbATAAqxYMCZUaNIVB6ca9UE0W5AoDhzlZ5fFLmBj+LSVDQirlw8qDRM5MW8FoVEvX1IsCBqXDSEuB7Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T18:52:56.044974Z","bundle_sha256":"e4140b42bc1e9034ef10ff3d997b660f91462b5166c3342728e141db7470d902"}}